The equation y = –x2 – 8x – 18 is shown by graph . The equation y = x2 – 4x + 7 is shown by graph . The equation y = x + 5 is shown by graph . The equation y = –3x – 6 is shown by graph .

The equation y x2 8x 18 is shown by graph The equation y x2 4x 7 is shown by graph The equation y x 5 is shown by graph The equation y 3x 6 is shown by graph class=